But I've noticed something that's not really a complete fix but a workaround. Download the latest 2K roster as well as latest patch. In the bottom right corner, if the game ever says "saving content", then whenever you try to play a game with rookies or check a rookie under Manage Roster, then he will have the black arms. However, if you wait out the "saving content" message until it's gone, and then go check (edit) a rookie, then he should be back to normal. This worked for me. This is on 360, btw, too.
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